noun

The term "watchman" typically refers to a person who is responsible for keeping watch or guarding a particular place, property, or activity.

Example

1. The watchman patrols the premises every hour to ensure that no unauthorized persons enter the building.
2. The captain stationed a watchman on the mast to keep a lookout for any approaching ships.
3. As a journalist, it is my duty to act as a watchman of democracy and hold those in power accountable for their actions.